What is the crack at the bottom of Lagerstroemia indica stem?

1, last winter, some growing tissues in the branches were injured.

2. The branches have been hit by external forces, or there are pests such as longicorn beetles on the trunk.

3. Normal causes:

After Lagerstroemia indica grows into a plant, the bark will gradually fall off until the trunk is completely exposed. Then, when the seedlings enter the peeling stage, from the appearance of the trunk, the bark that is falling off is like the trunk cracking.

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